diff --git a/package-lock.json b/package-lock.json
index db271c5..991f0c1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1523,6 +1523,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -2705,7 +2706,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
@@ -4588,9 +4590,9 @@
       "dev": true
     },
     "serve-marked": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/serve-marked/-/serve-marked-0.2.0.tgz",
-      "integrity": "sha512-BkFgYKzajiR2Knx8mvQSWY6Z7npNKakw6qWjJNTVWGEa+68gWLdXnS5scwGK7+T0G48Q043jv7PweVxW8AigAw==",
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/serve-marked/-/serve-marked-0.3.0.tgz",
+      "integrity": "sha512-/p+Sv2ggQojtqogb0GQOoNGGljl8IlB5Bms8E0HAwGwKQazqn7NygX2uGOh0IJVrnI4rElzL/wnh1EpMzmJynA==",
       "dev": true,
       "requires": {
         "marked": "^0.4.0"
diff --git a/package.json b/package.json
index 94cbca6..a9fe878 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "benchmark": "^2.1.4",
-    "serve-marked": "0.2.0",
+    "serve-marked": "0.3.0",
     "standard": "^11.0.1",
     "tap": "^12.0.1"
   },